Software and downloadable mobile computer software for providing business directories of the commercial and residential building and construction industry, providing a search engine that enables the user to search for building and construction products, elements and materials and to search for building and construction industry service providers, providing extraction and retrieval of information and data mining by means of global computer networks, providing indexes of information and resources for the building and construction industry, providing customized computer searching and retrieval services for information at the customer's specific request for the building and construction industry, providing business management services in the nature of inviting and managing bids on building and construction projects and providing a searchable database for matching contracting jobs and projects in the field of construction with businesses and individuals; software and downloadable mobile software for use by architects, engineers, contractors, developers and other design and build professionals in facilitating online communications and sharing design and construction documents and files